Unable to shutdown cleard.exe in CRM6 Flexible Deployment

Since our upgrade to CRM 6 SR1.18, we found that our workaround which restarts group of cleard.exe every day stops working properly (it seems to hang when trying to kill one or two cleard). There are no meaningful error description.

It is a completely new environment, with Tuxedo 8.1 patch level 299, running under Windows Server 2003 SP1 and using CRM6 Flexible Deployment patch SR1.18.